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针对基于基本数字签名的涉密群组准入方案不能很好地保护申请者的隐私信息,提出一种基于椭圆曲线ElGamal密码体制的有向签名方案,并将该方案应用于涉密群组的准入机制,提出一种基于有向签名的涉密群组准入方案。通过与椭圆曲线ElGamal加密算法和ECDSA数字签名算法的比较分析,结果表明基于有向签名的涉密群组准入方案在保证安全的条件下既保护了申请者的隐私又节省了计算资源。
Aiming at that the secret group admission scheme based on the basic digital signature can not protect the applicant’s private information well, a directional signature scheme based on elliptic curve ElGamal cryptosystem is proposed, and the scheme is applied to the secret group Admission mechanism, proposed a directional signature based on the group admission scheme. The results of comparison with ElGamal encryption algorithm and ECDSA digital signature algorithm show that the admission scheme based on directed signature can not only protect the privacy of applicants but also save the computational resources under the condition of ensuring security.